To find out the spatial distribution of lightning-related causalities for Bangladesh from 1990 to 2018. A graphical representation of lightning-related fatalities based on gender variations from 1990 to 2018. Find out the year wise seasonal variation of lightning related fatalities from 1990 to 2018.

1. Lightning in Bangladesh
A CASE STUDY ON LIGHTNING RELATED CAUSALITIES IN BANGLADESH
By
SAYED SHAJEDUL HASAN

2. OBJECTIVE
This study sets out to achieve the following objectives:
 To find out the spatial distribution of lightning-related causalities for Bangladesh from
1990 to 2018.
 A graphical representation of lightning-related fatalities based on gender variations from
1990 to 2018.
 Find out the year wise seasonal variation of lightning related fatalities from 1990 to 2018.

3. METHODOLOGY OF THE STUDY
• Data presented in this study has been collected through various sources such as news
item, informants that have contacted the department of disaster management
Bangladesh, and personal communication.
• Based on above information, simple numerical calculations were used for quantitative
analysis, and subsequently the information was summarized in the form of simple table
graphs and map using a geographical information system.
• The data of lightning fatalities used in this report are based on Department of Disaster
Management Bangladesh, an annual publication that describes lightning fatalities and
damaging.
• In this report we describe fatal lightning events that occur in the country, along with
their date, location, and the person’s death or injured. The damage, the causes have not
been indicated in this report.

4. LIMITATION:
We couldn't found the exact number of the death people. the police informed us that usually people don't
go for any complain in this type of issue. For this reason, we've made these list with the help of govt.
survey and other’s documents about these topics.

5. • Lightning is a giant spark of electricity in the atmosphere between clouds, the air, or the ground.
• In the early stages of development, air acts as an insulator between the positive and negative charges
in the cloud and between the cloud and the ground.
• When the opposite charges build up enough, this insulating capacity of the air breaks down and there
is a rapid discharge of electricity that we know as lightning.
• The flash of lightning temporarily equalizes the charged regions in the atmosphere until the opposite
charges build up again.
• Lightning is extremely hot—a flash can heat the air around it to temperatures five times hotter
than the sun’s surface.
• This heat causes surrounding air to rapidly expand and vibrate, which creates the pealing thunder
we hear a short time after seeing a lightning flash.
LIGHTNING

6. • Lightning is a deadly natural disaster that poses serious danger to humans.
• Lightning is a giant spark of electricity in the atmosphere between clouds, the air, or the ground.
• Most lightning happens inside a cloud, but sometimes it happens between the cloud and the ground.
• Every day 8 million lightning are taking place somewhere on the earth.
• Lightning containing an average charge of 30 to 50 lakhs volts and a current of 30 kilo amperes with
a speed of 220 km per hour.
• In 1752 Benjamin Franklin, prove that lightning is caused by static electric charges in the cloud.
• Most lightning is called ‘‘Sheet lightning’’. The other kind is called “cloud-to-ground’ ’and is much
less frequent but much more dangerous.
LIGHTNING FACTS

7. TYPE OF LIGHTNING
• Cloud to ground lightning (CG) : • Intra–cloud lightning (IC):

8. LIGHTNING DISCHARGE PROCESSES :
Figure: Downward propagating stepped leader followed by a return stroke. The
illustrated flash carries negative charge to the ground and is called negative cloud-
to-ground flash.

9. LIGHTNING FATALITIES MECHANISMS:
• Figure 2.4: The frequencies of the primary lightning fatality mechanisms.

10. WHERE DOES LIGHTNING STRIKE:
• Tall objects such as trees and skyscrapers are commonly struck by lightning.
• Mountains also make good targets, the reasons for this is their tops are closer to the base of the storm
cloud.
• However, this does not always mean tall objects will be struck.it all depends on where the charges
accumulate.
• Lightning can strike the ground in open field even if the tree line is close by.

11. Lightning in Bangladesh
• Death by lightning has been a common problem for Bangladesh in summer.
• A previous report (Gomes et al.2006) that in Bangladesh, the incidence of lightning fatalities is
0.9 per 1,000,000 people per year, which is higher than any high income country.
• In 2016, the country had a lightning event with several strikes, causing 261 deaths, which is
particularly high.
• Lightning injuries and related deaths mostly affect individuals who work outside or participate in
outdoor recreational activities.
• The problem has promoted the government to add lightning the country’s list of official types of disasters.

12. Figure: fatalities mapping district wise.
Spatial distribution of fatalities (1990-2018):
Division Area
(km²)
Population
(million)
fatalities Rate of
fatalities
(per m per
year)
Dhaka 20551 36.4 685 0.85
Chattogram 33771 28.3 617 1.00
Rajshahi 18197 18.4 550 1.11
Rangpur 16317 15.9 554 1.33
Mymensingh 10569 11 321 1.15
Sylhet 12596 9.9 452 1.67
Barisal 13297 8.4 196 0.82
Khulna 22272 15.7 426 1.08
total 147570 144.0 3801 1.13

13. Dhaka division Death rate:1990-2018
Dhaka Division
District name Area
(km²)
Population
(million)
fatalities Rate of fatalities
(per m per year)
Dhaka 1464 12.0 73 0.21
faridpur 2073 1.9 60 1.09
Gazipur 1800 3.4 53 0.54
Gopalganj 1490 1.2 32 0.92
Kishoregonj 2689 2.9 132 1.57
Madaripur 1145 1.2 39 1.12
Manikganj 1379 1.4 72 1.77
Munshiganj 955 1.4 19 0.47
Narayanganj 700 2.9 28 0.33
Narsingdi 1141 2.2 61 0.96
Rajbari 1119 1.1 39 1.22
Tangail 3414 3.6 69 0.66
Shariatpur 1182 1.2 8 0.23
Total 20551 36.4 685 0.85

14. Chattogram Division death rate 1990-2018
• Chattogram Division
District name Area
(km²)
Population
(million)
fatalities Rate of fatalities
(per m per year)
Bandarban 4479 0.4 12 1.03
Brahmanbaria 1927 2.8 117 1.44
Chandpur 1704 2.4 42 0.60
Chattogram 5283 7.6 68 0.31
Cumilla 3085 5.4 86 0.55
Cox’s Bazar 2492 2.3 137 2.05
Feni 928 1.4 18 0.44
Khagrachhari 2700 0.6 37 2.13
Lakshmipur 1456 1.7 30 0.61
Noakhali 3601 3.1 45 0.50
Rangamati 6116 0.6 25 1.43
total 3377
1
28.3 617 1.00

15. Rajshahi Division death rate 1990-2018
• Rajshahi Division
District
name
Area
(km²)
Population
(million)
fatalities Rate of fatalities
(per m per year)
Bogura 2920 3.4 55 0.56
Chapai
Nawabganj
1703 1.6 153 3.30
Joypurhat 965 0.9 15 0.57
Naogaon 3436 2.6 65 0.86
Natore 1896 1.7 40 0.81
Pabna 2372 2.5 66 0.91
Rajshahi 2407 2.6 78 1.03
Sirajganj 2498 3.1 78 0.87
total 18197 18.4 550 1.11

16. Rangpur Division death rate 1990-2018
• Rangpur Division
District
name
Area
(km²)
Population
(million)
fatalities Rate of
fatalities (per
m per year)
Dinajpur 3438 3.0 76 0.87
Gaibandha 2179 2.4 90 1.29
Kurigram 2296 2.1 63 1.03
Lalmonirhat 1241 1.3 73 1.94
Nilphamari 1580 1.8 62 1.19
Panchagarh 1405 1.0 53 1.83
Rangpur 2368 2.9 71 0.84
Thakurgaon 1810 1.4 66 1.63
total 16317 15.9 554 1.33

17. Mymensingh Division death rate 1990-2018
• Mymensingh Division
District name Area
(km²)
Population
(million)
fatalities Rate of fatalities
(per m per year)
Jamalpur 2032 2.3 58 0.87
Mymensingh 4363 5.1 96 0.65
Netrakona 2810 2.2 114 1.77
Sherpur 1364 1.4 53 1.31
total 10569 11 321 1.15

18. Sylhet Division death rate 1990-2018
• Sylhet Division
District
name
Area
(km²)
Population
(million)
fatalities Rate of fatalities
(per m per year)
Habiganj 2637 2.1 124 2.04
Moulvibazar 2799 1.9 85 1.54
Sunamganj 3670 2.5 173 2.39
Sylhet 3490 3.4 70 0.71
Total 12596 9.9 452 1.67

19. Barisal Division death rate 1990-2018
• Barisal Division
District
name
Area
(km²)
Population
(million)
fatalities Rate of fatalities
(per m per year)
Barguna 1831 0.9 23 0.88
Barisal 2785 2.4 58 0.83
Bhola 3403 1.8 24 0.46
Jhalokathi 749 0.7 14 0.69
Patuakhali 3221 1.5 41 0.94
Pirojpur 1308 1.1 36 1.13
Total 13297 8.4 196 0.82

20. Khulna Division death rate 1990-2018
• Khulna Division
District
name
Area
(km²)
Population
(million)
fatalities Rate of
fatalities
(per m per
year)
Bagerhat 3959 1.5 56 1.29
Chuadanga 1177 1.1 26 0.82
Jashore 2567 2.8 43 0.53
Jhenaidah 1961 1.8 44 0.84
Khulna 4394 2.3 32 0.48
Kushtia 1601 1.9 36 0.65
Magura 1049 0.9 47 1.80
Meherpur 716 0.7 29 1.43
Narail 990 0.7 32 1.58
Satkhira 3858 2.0 81 1.40
Total 22272 15.7 426 1.08

21. Number of fatalities and rate for the top 7 districts:
District name Area
(km²)
Population
(million)
fatalities Rate of fatalities
(per m per year)
Sunamganj 3670 2.5 173 2.39
Chapai Nawabganj 1703 1.6 153 3.30
Cox’s Bazar 2492 2.3 137 2.05
Kishoregonj 2689 2.9 132 1.57
Habiganj 2637 2.1 124 2.04
Brahmanbaria 1927 2.8 117 1.44
Netrakona 2810 2.2 114 1.77

22. Gender variation of lightning related fatalities :(1990-2018)
2769
440
592
0
500
1000
1500
2000
2500
3000
Male Female Child
fatalities
Gender
Male Female Child
Male
73%
Female
12%
Child
15%
Male Female Child

23. SEASONAL DISTRIBUTION:1990 TO 2018
Winter (December – February) :
45
Pre monsoon (march-may):
2426
Monsoon (June -September):
1082
post monsoon (October-November):
136
N.B: According to the counts, there are 3801
casualties in the country. Season of a few numbers is
not known.
WINTER
1%
PREMONSOON
66%
MONSOON
29%
POSTMONSOON
4%
WINTER PREMONSOON MONSOON POSTMONSOON

24. 0
50
100
150
200
250
300
350
1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
Pre Monsoon Monsoon Post Monsoon Winter
SEASONAL DISTRIBUTION:1990 TO 2018

25. INDIVIDUAL YEAR WISE FATALITIES (2011 TO 2018):
120
195
177
143
123
138
265
241
28
45
53
28
23
30
82
73
31
61
55
39 40 40 42 41
0
50
100
150
200
250
300
death
years
Male Female Child

26. SOCIOECONOMIC CONDITIONS AFFECTING ACTIVITIES OF LIGHTNING FATALITIES
Work , 34%
Sport, 8%
Leisure, 22%
Travelling, 26%
Other, 10%

27. LIGHTNING STRIKES TO A LARGE NUMBER OF PEPOPLE:
Date and year Districts fatalities
12 may 2016 Dhaka(3), Pabna(6), Narshindi(5), Netrakona(2), Kisharganj(4),
B.Baria(6), Natore(2), Bogra(1), Rajshahi(6), Sirajganj(2), Pirojpur(1),
Gazipur(2), Nilphamari(1), Tangail(1), Hobiganj(1), Noagaon(4),
Dinajpur(2), Rajbari(4)
53
09may 2018 Comilla(6), Narsingdi(8), Kisharganj(3),Sirajganj(3),
Mymensingh(1),Rajshahi(3),Sunamganj(4),Gaibandha(2),Hobiganj(4),
Manikganj(3),Kurigram(1),Chandpur(1),Nilfamari(2),Sylhet(2).
44
13 may 2016 Hobiganj(3), Dhaka(2), Joypurhat(3), Chandpur(1), Jessore(1),
Magura(1), Rajshahi(1), Sunamganj(2), Noagoan(3), Narsingdi(1),
Kishoreganj(2), Sirajganj(5), Tangail(3), Chittagong(2), Gaibandha(2).
32
03 may 1993 Cox’s bazar 31
2 June 1991 Kurigram 27
6 May 2013 Sunamgonj(4), Khishorganj(3), Madaripur(3), Netrokona(3), Noakhali(2),
Bagerhat(2), Chandpur(1), Maulvibazar(1), Hobiganj(1), Chittagong(1),
Thakurgoan(1), Mymensingh(1), Sherpur(1) and Comilla(1).
25
29 April 2018 25